My PSN (Playstation network) follows me everywhere on Android …

Is it worth it to turn on my PS3, PSVita or PS4 if I don't have any of my friends online? Do I still have more trophies than Jeff? How can get this last trophy?
If you ask yourself these questions from time to time, then there is YaPSNapp for that. With this app, you will be able to learn anytime and anywhere, which of your friends is online and whether you will be able to play your favorite FPS.